JFO-class Mjolnir

From Halopedia, the Halo wiki
Jump to: navigation, search
HR JFO.png
Production overview



Testing site(s):

Special Warfare Center Essen, Deutschland[1]




Coordinating fire support

Technical specifications

The MJOLNIR Powered Assault Armor/J variant, colloquially known as JFO, is a variant of the MJOLNIR Powered Assault Armor manufactured by Beweglichkeitsrüstungsysteme.[1][2]


JFO is a Mjolnir variant that improves artillery request communication/coordination by Spartans across the Army, Navy, and Marine Corps. Spartans also using JFO are also fielded with systems and programs to protect them.[1]

Development history[edit]

JFO was developed by Beweglichkeitsrüstungsysteme at the Special Warfare Center Essen.[1]


It was often fielded by single Spartans in reconnaissance, infiltration, and artillery targeting scenarios behind enemy lines.[1] In 2553, the JFO helmet was worn by SPARTAN-III Owen-B096 as part of his mission with Outpost Discovery.[3][4]

In-game information[edit]

Halo: Reach[edit]


Designed and tested at Beweglichrüstungsysteme this helmet is fully compatible with all armor systems.
Base Price: 60,000 cR, Lt. Colonel

  • Description: Beweglichrüstungsysteme was home to many projects attached to the MJOLNIR program.

HUL-I Price: 20,000 cR, Lt. Colonel

  • Description: External hardened uplink-improved; upgraded variant of the standard issue HUL unit.

UA Price: 10,000 cR, Lt. Colonel

  • Description: Up-armored variant of the base Mk.V[J] pattern helmet.

The JFO helmet appears in the armory upon reaching the rank of Warrant Officer, but is not unlocked until Lieutenant Colonel.[2]

Two upgrades are available for the helmet. The first adds a Hardened Uplink Module-Improved, (HUL-I), and the second adds an Up-Armor plate (UA).[2]

The helmet features a large visor, shaped like a shield or a fattened "T", and has two small air intakes on the cheek areas. Overall, the helmet provides significant armor coverage, protecting the majority of the head while maintaining a large field of vision.

In-game, the HUL-I is available only for the JFO helmet.


Price: 1,000 cR, Recruit

  • Description: Designed and tested at Beweglichrüstungsysteme of Essen, Deutschland.

The JFO shoulder pauldrons are available from the beginning of the game.[2]

The shoulder pieces are semi-circular arches that jut outwards from the shoulders. They also feature black, two-pronged protrusions that point parallel to the arm, and away from the hands.


Main-Superintendent.png Browse more images in this article's gallery page.
  • JFO stands for Joint Fires Observer, a United States military designation for troops who coordinate fire support from land-based artillery and naval gun formations, as well as close air support.
  • The visor of the JFO helmet somewhat resembles the faceplate of the Marvel Comics character Iron Man.
  • The shape of the helmet and the large visor also give it something of a resemblance to the helmets worn by NMPD officers.


List of appearances[edit]